Hauv kev kho mob hemodialysis, AVF koob (Arteriovenous Fistula Needle) ua haujlwm raws li "choj" txuas tus neeg mob lub neej kab nrog lub tshuab lim ntshav. Kev xaiv cov khoom siv ncaj qha txiav txim siab txog kev nyab xeeb thiab kev ua tau zoo ntawm kev kho mob. Cov chaw tsim khoom xaiv cov khoom siv stainless hlau yog qhov kev ua si zoo uas suav nrog kev xav txog biocompatibility, corrosion kuj, thiab txhua yam muaj zog. Nws yuav tsum tau ua raws li ISO 10993 cov qauv kev nyab xeeb kev nyab xeeb thiab cov kev xav tau ntawm kev kho mob ntev ntev - siv los ntawm cov neeg mob.

Qhov sib txawv layout ntawm 304 thiab 316L

Cov tuam txhab lag luam tseem ceeb feem ntau xaiv 304 stainless hlau raws li cov khoom nyiam rau kev dav - lub hom phiaj AVF koob. Nws muaj 18% chromium thiab 8% npib tsib xee, tsim kom muaj chromium oxide passivation zaj duab xis uas tuaj yeem tiv thaiv corrosion los ntawm cov dej ntsev niaj hnub yaug thiab cov txheej txheem tshuaj tua kab mob. Txawm li cas los xij, rau cov neeg mob uas xav tau ntev - lub sij hawm nyob hauv tsev lossis kev sib cuag nrog siab -concentration chloride dialysis kua, 316L stainless hlau yog ib qho kev daws teeb meem zoo dua - ntxiv 2%-3% molybdenum keeb ua rau nws zoo dua rau 304 nyob rau hauv cov nqe lus ntawm kev tiv thaiv rau pitting thiab crevice cov pab pawg neeg siab 1, xws li corrosion 1 ntshav qab zib nephropathy. Cov neeg tsim khoom yuav tsum nruj me ntsis tswj cov pa roj carbon cov ntsiab lus ntawm cov khoom (tsawg dua los yog sib npaug li 0.03%), tsis txhob cuam tshuam kev sib tsoo thaum lub sij hawm vuam los yog kub kom tsis muaj menyuam, thiab xyuas kom meej tias rab koob lub cev tsis tawg lossis xau thaum siv dua.

Txoj Cai Ua Raws Cai rau Cov Khoom Siv Ntawv Pov Thawj

Cov tuam txhab muaj lub luag haujlwm tsis yog cia siab rau cov ntaub ntawv pov thawj (MTC) uas muab los ntawm cov neeg muag khoom; Hloov chaw, lawv tsim kom muaj tag nrho -chain traceability system. Txhua batch ntawm stainless hlau yuav tsum tau mus soj ntsuam spectral los xyuas cov tshuaj muaj pes tsawg leeg thiab khaws cov metallographic qauv kuaj daim ntawv qhia kom paub meej cov khoom zoo li qub thiab tsis muaj inclusions. Piv txwv li, Manners Technology xav kom tag nrho cov ntaub ntawv raw tuaj nrog ISO 10993 biocompatibility test report, npog 12 qhov ntsuas xws li cytotoxicity, rhiab heev, thiab khaus khaus, txhawm rau tshem tawm cov kev pheej hmoo ntawm kev mob tshwm sim lossis thrombosis los ntawm cov khoom siv.

Tswj kev ua tau zoo hauv kev ua cov khoom siv

Tom qab cov khoom raug xaiv, cov chaw tsim khoom yuav tsum tau txhim kho qhov kev ua tau zoo los ntawm kev ua haujlwm txias. Tom qab 30% -40% txias deformation ntawm 304 stainless hlau, lub zog tensile tuaj yeem nce los ntawm 520 MPa mus rau saum 800 MPa, ua tau raws li qhov yuav tsum tau ua kom nruj rau AVF koob txhaj; thaum 316L, vim nws qhov kev ua haujlwm qis dua, yuav tsum muaj cov txheej txheem kev kho cua sov tom qab txhawm rau txhim kho toughness. Nws yog ib qho tsim nyog sau cia tias cov chaw tsim khoom yuav tsum sib npaug hardness thiab toughness: nyuaj heev tuaj yeem ua rau lub taub hau tawg, thiab muag heev tuaj yeem ua rau khoov thaum lub sij hawm puncture. Los ntawm kev tswj cov kev ua haujlwm txias thiab qhov kub thiab txias, qhov hardness tuaj yeem tswj tau nyob rau hauv HRC 30-40, kom ntseeg tau tias qhov sib npaug zoo tshaj plaws ntawm qhov tob ntawm rab koob thiab qhov tsis kam rau khoov ntawm rab koob lub cev.

Clinical Scenario-Triven Material Innovation

Rau cov pab pawg neeg mob tshwj xeeb, cov tuam txhab tsim khoom yuav tsum tsim cov khoom siv kho kom haum. Piv txwv li, rau cov neeg mob ua xua rau npib tsib xee, npib tsib xee-titanium zoo nco alloys tuaj yeem siv tsis siv stainless hlau; rau cov menyuam yaus cov neeg mob uas yuav tsum tau txo cov phab ntsa vascular puas tsuaj, kev kho mob -qib titanium alloys tuaj yeem sim, ua kom zoo dua ntawm lawv qhov ntom ntom kom txo tau qhov tsis kam. Cov kev tsim kho tshiab no yuav tsum tau ua raws li kev soj ntsuam kev nyab xeeb kev nyab xeeb. Cov neeg tsim khoom yuav tsum koom tes nrog cov tsev kho mob los ua kom ntev ntev - ua raws li - cov kev tshawb fawb los txheeb xyuas qhov ua tau zoo thiab kev nyab xeeb ntawm cov ntaub ntawv tshiab.

Xaus

Kev xaiv cov ntaub ntawv rau AVF koob yog nyob deb ntawm qhov yooj yim "stainless steel vs alloy" binary tawm tsam. Hloov chaw, nws koom nrog kev sib koom ua ke ntawm cov khoom siv noob caj noob ces, kev ua cov txheej txheem, thiab cov kev cai kho mob los ntawm cov tuam ntxhab. Tsuas yog los ntawm kev hloov cov ntaub ntawv tshawb fawb mus rau qhov ntsuas ntsuas qhov ntsuas tau zoo tuaj yeem muab cov cuab yeej lim ntshav muaj kev nyab xeeb thiab txhim khu kev qha rau cov neeg mob.